Exercise your brain! Mind Games is a great collection of games based in part on principles derived from cognitive tasks to help you practice different mental skills. This app includes many excellent free games. There are many trial games from Mind Games Pro that allow you to play 3 times. All games include your score history and a graph of your progress. Using some principles of standardized testing, your scores are also converted to a standardized scale so that you can see where you need work and excel. Not sure where to focus? Training Center does the work for you by picking the perfect mix of exercises to keep you engaged. Mind Games is intended to be brain challenging entertainment. No research has yet been conducted to determine if this app has cognitive benefits.